class Person:
    def __init__(self, name, age):
        self._name = name
        self._age = age

    def show(self):
        return f'{self._name}今年{self._age}岁了'


class Student(Person):
    def __init__(self, name, age):
        super().__init__(name, age)

    def show(self):
        return f'{self._name}明年{self._age + 1}岁了'


stu = Student('王五', 25)
print(stu.show())